检索结果-南通市图书馆

On the Symmetry Classes of Functions

在线全文

学校读者我要写书评

暂无评论

Wuhan university Journal of Natural Sciences 2005年第5期10卷 813-816页

作者： ZHU Ping~1.2. {1. yun~3 1. {2. of mathematics and statistics, Wuhan university, Wuhan 430072. hubei, china 2. {2. of Science, Beijing university of Posts and Telecommunications, Beijing 1.0876, china 3. {2. of mathematics and statistics, Huazhong Normal university, Wuhan 430079, hubei, china Wuhan university School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Beijing university of Posts and Telecommunications School of Science Beijing China (GRID:grid.31880.32) Huazhong Normal university School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.411407.7) (ISNI:***)

Let R be an integral domain of characteristic zero such that the corresponding group rings have block decompositions. We first prove that the submodule consisting of all the R-valued ξi-symmetric functions of several variables is a symmetry class, where ξi is any block character. Then we present a relationship among certain operators introduced for block character. Then we present a relationship among certain operators introduced for block characters. As a consequence, we obtain a decomposition of an arbitrary R-valued function of several variables. Finally, we describe the symmetry property of such summands and determine all the symmetry classes.

关键词： symmetry class strict symmetry class blockcharacter ξi-symmetric function block idempotent

Association of Human Whole-blood NAD+Levels with Nabothian Cyst

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2024年第5期37卷 471-478页

作者： XU Ling WANG yue Xuan WANG Wei {1. Xue CHEN Xue yu ZHOU Tian yun LIU yu He yu Ye YANG {1. JU Zhen yu ZHOU Yong WANG Deng Liang Clinical Research Institute Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China NHC Key Lab of Reproduction Regulation Shanghai Engineering Research Center of Reproductive Health Drugs and DevicesShanghai Institute for Biomedical and Pharmaceutical TechnologiesShanghai 200237China Department of Applied statistics Johannes Kepler University LinzLinz 4040Austria Hematology Center Beijing Key Laboratory of Pediatric Hematology OncologyNational Key Discipline of Pediatrics(Capital Medical University)Key Laboratory of Major Diseases in ChildrenMinistry of EducationBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China Department of Biostatistics School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012ShandongChina Clinical Medicine School of Basic MedicineShanghai Medical College Fudan UniversityShanghai 200032China Department of Biochemistry and Molecular Biology Hengyang Medical SchoolUniversity of South ChinaHengyang 421001HunanChina Administrative Office Total Quality Management OfficeTotal Quality Management InstituteShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China The First Affiliated Hospital of Jinan university Institute of Aging and Regenerative MedicineJinan UniversityJinan 510632GuangzhouChina Department of Scientific Research The First Affiliated Hospital of Huzhou UniversityHuzhou 313000ZhejiangChina Department of Neurosurgery Neurosurgery Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina Department of Neurosurgery Binhai Branch of National Regional Medical CenterThe First Affiliated HospitalFujian Medical UniversityFuzhou 350209FujianChina Fujian Provincial Institutes of Brain Disorders and Brain Sciences The First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina Fujian Provincial Clinical Research Center for Neurological

Objective Little is known about the association between whole-blood nicotinamide adenine dinucleotide(NAD^(+))levels and nabothian *** study aimed to assess the association between NAD^(+)levels and nabothian cysts in healthy Chinese *** Multivariate logistic regression analysis was performed to analyze the association between NAD^(+)levels and nabothian *** The mean age was 43.0±1..5 years,and the mean level of NAD^(+)was 31.3±5.3μmol/*** cysts occurred in 1.4(2..7%)participants,with single and multiple cysts in 1.0(1..0%)and84(1.0}6%)participants,*** total nabothian cyst prevalence gradually decreased from37.4%to 2..6%from Q1.to Q4 of NAD^(+)and the prevalence of single and multiple nabothian cysts also decreased across the NAD^(+)*** compared with the highest NAD^(+)quartile(≥34.4μmol/L),the adjusted odds ratios with 95%confidence interval of the NAD^(+)Q1.was 1.89(1.1.–3.1.)for total nabothian *** risk of total and single nabothian cysts linearly decreased with increasing NAD^(+)levels,while the risk of multiple nabothian cysts decreased more rapidly at NAD^(+)levels of 2..0 to35.0μmol/***:Low NAD^(+)levels were associated with an increased risk of total and multiple nabothian cysts.

关键词： Nicotinamide adenine dinucleotide Nabothian cyst Female Risk factor

Equivalence problem for Bishop surfaces

在线全文

学校读者我要写书评

暂无评论

Science china {1. 2010年第3期53卷 687-700页

作者： HUANG XiaoJun 1, & YIN WanKe 2.1 Department of mathematics, Rutgers university, New Brunswick, NJ 08902. USA 2.{2. of mathematics and statistics, Wuhan university, Wuhan 430072. china 1. Department of mathematics Rutgers University New Brunswick NJ 08902 USA2. School of Mathematics and Statistics Wuhan University Wuhan 430072 China

The paper has two parts. We first briefly survey recent studies on the equivalence problem for real submanifolds in a complex space under the action of biholomorphic transformations. We will mainly focus on some of the recent studies of Bishop surfaces, which, in particular, includes the work of the authors. In the second part of the paper, we apply the general theory developed by the authors to explicitly classify an algebraic family of Bishop surfaces with a vanishing Bishop invariant. More precisely, we let M be a real submanifold of C 2.defined by an equation of the form w = zz + 2.e(z s + az s+1.) with s≥ 3 and a a complex parameter. We will prove in the second part of the paper that for s≥ 4 two such surfaces are holomorphically equivalent if and only if the parameter differs by a certain rotation. When s = 3, we show that surfaces of this type with two different real parameters are not holomorphically equivalent.

关键词： equivalence problem Bishop surface Chern-Moser theory elliptic and hyperbolic complex tangents normal form and modular space

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2024年第3期18卷 378-389页

作者： Zhao-ting SHANG Tang-ming LI Bing-qian HU Min LIU Wang-ting LU fan {1. {2. ZHENG Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education College of Optoelectronic Materials and TechnologyJianghan UniversityWuhan 430056China Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1Canada

The use of two-dimensional(2.)layered metal-organic frameworks(MOFs)as self-sacrificial templates has been proven to be a successful method to create high-efficiency Selenium(Se)-containing electrocatalysts for overall water ***,two strategies are then utilized to introduce Se element into the Co–Fe MOF,one being the etching of as-prepared MOF by SeO_(2. solution,and the other,the replacing of SCN−with SeCN−as the construction *** electrochemical activity of the pristine 2. MOF and their calcinated derivatives for catalyzing the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is evaluated and further *** is found that the effect of introducing Se on improving electrochemical catalytic activity is significant for the HER ***,the calcinated derivative in the replacing method exhibits an overpotential of 2.5 mV for HER and 2.0 mV for OER at a current density of 1. mA/*** comparing the two methods of introducing Se element into MOF,similar electrocatalytic activity can be achieved on the their calcinated *** high electrochemical performance of 2. CoFe-MOF derivatives may be resulted from the unique 2. hierarchical porous structure and strong synergistic effect between different components in the material.

关键词： 2. MOF selenium(Se)-containing materials hydrogen evolution reaction(HER) oxygen evolution reaction(OER)

VARIABLE STEP-SIZE BDF3 METHOD FOR ALLEN-CAHN EQUATION

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computational mathematics 2024年第5期42卷 1380-1406页

作者： Minghua Chen fan {1. Qingdong Zhang Zhimin Zhang school of {1. and {2. Gansu Key Laboratory of Applied Mathematics and Complex SystemsLanzhou UniversityLanzhou 730000China Department of mathematics Wayne State UniversityDetroitMI 48202USA

In this work,we analyze the three-step backward differentiation formula(BDF3)method for solving the Allen-Cahn equation on variable *** BDF2.method,the discrete orthogonal convolution(DOC)kernels are positive,the stability and convergence analysis are well established in[Liao and Zhang,***.,90(2.2.),1.0}7–1.0}6]and[Chen,yu,and Zhang,arXiv:2.08.02.1.,2.2.].However,the numerical analysis for BDF3 method with variable steps seems to be highly nontrivial due to the additional degrees of freedom and the non-positivity of DOC *** developing a novel spectral norm inequality,the unconditional stability and convergence are rigorously proved under the updated step ratio restriction rk:=τk/τk−1.1.405 for BDF3 ***,numerical experiments are performed to illustrate the theoretical *** the best of our knowledge,this is the first theoretical analysis of variable steps BDF3 method for the Allen-Cahn equation.

关键词： Variable step-size BDF3 method Allen-Cahn equation Spectral norm inequality Stability and convergence analysis

A theorem of Fong's type for graded algebras

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china {1. 2005年第5期48卷 577-582页

作者： fan {1. & ZHU Ping {2. of mathematics and statistics, Central china Normal university, Wuhan 430079, china {2. of Mathematical Science, Nankai university, Tianjin 300071. china 1. school of {1. and {2. Central China Normal University 430079 Wuhan China 2. {1. of Mathematical Science Nankai University 300071 Tianjin China

Let G be a finite p-solvable group and k be an algebraic closed field of characteristic p. It is proved that any projective indecomposable module of a G-graded k-algebra is an induced module of a module of the subalgebra graded by a Hall p′-subgroup. A necessary and sufficient condition for the indecomposability of an induced module from a Hall p′-subgroup is obtained.

关键词： group graded algebra indecomposable induced module primitive idempotent.

Enhanced activation of peroxymonosulfate on layered molybdenum disulfide loaded with Co-La bimetallic oxide for efficient degradation of chloramphenicol

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第9期43卷 4628-4635页

作者： yu-Ning {1. {2.-Qiu Zhang San-Shuang Gao Zeng-Hui Bi Yin Wang Shu-Xing Zhou Qian Liu Tian-Ping Lv Guang-Zhi Hu Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650504China hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China Institute for Advanced Study Chengdu UniversityChengdu 610106China

The use of transition metal-activated peroxymonosulfate(PMS)as an advanced oxidation technology has gained *** study developed a catalyst using cobaltDlanthanum bimetallic oxide supported on layered molybdenum disulfide(Mo S_(2.)as a *** CoDLa/Mo S_(2.catalyst was synthesised through coprecipitation,followed by calcination with an optimised metal ratio of Co:La=2.1.to activate PMS and degrade trace chloramphenicol(CAP)in *** chemical composition of the catalyst was confirmed using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).At catalyst and PMS dosages of 0.1.and 0.5 g·L^(-1.,respectively,the degradation rate of CAP was 95%with in 30 *** catalyst exhibitedstrong resistance to most interfering anions and maintained a high degradation rate at p H *** chromatographyDmass spectrometry analysis revealed the potential degradation pathways of CAP in the CoDLa/Mo S_(2.(2.1./PMS *** other pollutants,such as oxytetracycline,complete degradation was achieved within 2. min,demonstrating the broad applicability of the CoDLa/Mo S_(2.(2.1./PMS system for the degradation and removal of antibiotic organic contaminants.

关键词： catalyst molybdenum disulfide

The Consistency of LSE Estimators in Partial Linear Regression Models under Mixing Random Errors

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第5期40卷 1244-1272页

作者： yun Bao YAO {1. Tan LÜ Chao LU Wei WANG Xue Jun WANG school of Mathematical Sciences Anhui UniversityHefei 230601P.R.China school of Big Data and Artificial Intelligence Chizhou UniversityChizhou 247000P.R.China school of Big Data and {1. Anhui UniversityHefei 230601P.R.China

In this paper,we consider the partial linear regression model y_(i)=x_(i)β^(*)+g(ti)+ε_(i),i=1.2....,n,where(x_(i),ti)are known fixed design points,g(·)is an unknown function,andβ^(*)is an unknown parameter to be estimated,random errorsε_(i)are(α,β)-mix_(i)ng random *** p-th(p>1.mean consistency,strong consistency and complete consistency for least squares estimators ofβ^(*)and g(·)are investigated under some mild *** addition,a numerical simulation is carried out to study the finite sample performance of the theoretical ***,a real data analysis is provided to further verify the effect of the model.

关键词： (α,β)-mixing random variables partial linear regression model least squares estimator consistency

Dynamic Treatment Strategy of Chinese Medicine for Metastatic Colorectal Cancer Based on Machine Learning Algorithm

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第11期30卷 993-1000页

作者： XU yu-ying LI Qiu-yan YI Dan-hui CHEN yue ZHAI Jia-wei ZHANG Tong SUN Ling-{2. YANG yu-fei Department of Oncology Xiyuan Hospital China Academy of Chinese Medical Sciences school of {1. Renmin University of China Graduate school Beijing University of Chinese Medicine

Objective: To establish the dynamic treatment strategy of Chinese medicine(CM) for metastatic colorectal cancer(m CRC) by machine learning algorithm, in order to provide a reference for the selection of CM treatment strategies for m CRC. Methods: From the outpatient cases of m CRC in the Department of Oncology at Xiyuan Hospital,{1. Academy of Chinese Medical Sciences, 1.7 cases that met the inclusion criteria were screened. According to different CM intervention strategies, the patients were divided into 3 groups: CM treatment alone, equal emphasis on Chinese and Western medicine treatment(CM combined with local treatment of tumors, oral chemotherapy, or targeted drugs), and CM assisted Western medicine treatment(CM combined with intravenous regimen of Western medicine). The survival time of patients undergoing CM intervention was taken as the final evaluation index. Factors affecting the choice of CM intervention scheme were screened as decision variables. The dynamic CM intervention and treatment strategy for m CRC was explored based on the cost-sensitive classification learning algorithm for survival(CSCLSurv). Patients' survival was estimated using the Kaplan-Meier method, and the survival time of patients who received the model-recommended treatment plan were compared with those who received actual treatment plan. Results: Using the survival time of patients undergoing CM intervention as the evaluation index, a dynamic CM intervention therapy strategy for m CRC was established based on *** CM intervention strategies for m CRC can be selected according to dynamic decision variables, such as gender, age, Eastern Cooperative Oncology Group score, tumor site, metastatic site, genotyping, and the stage of Western medicine treatment at the patient's first visit. The median survival time of patients who received the modelrecommended treatment plan was 35 months, while those who receive the actual treatment plan was 2..0 months(P=0.06). Conclusions:

关键词： Chinese medicine cost sensitive classification learning for survival dynamic treatment strategy metastatic colorectal cancer